:root{--primary:#2c3e50;--accent:#e74c3c;--accent-hover:#c0392b;--secondary:#3498db;--success:#27ae60;--success-hover:#219e50;--gray:#95a5a6;--light-gray:#ecf0f1;--text:#2c3e50;--bg-gradient:linear-gradient(135deg, #74ebd5, #9face6);--container-bg:white;--shadow:0 10px 25px rgba(0, 0, 0, 0.25);--border-radius:18px;--transition:all 0.3s ease}body.dark-mode{--primary:#ecf0f1;--text:#ecf0f1;--success:#27ae60;--container-bg:#1E123C;--shadow:0 10px 25px rgba(0, 0, 0, 0.4);--bg-gradient:linear-gradient(135deg, #16213e, #0f3460)}body{background:var(--bg-gradient);min-height:100vh;transition:background 0.5s;margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen,Ubuntu,sans-serif}.img-pdf-container{max-width:100%;margin:auto;background:var(--container-bg);border-radius:0;padding:50px 30px;overflow:hidden;position:relative;transition:background 0.5s;color:var(--text);box-sizing:border-box}.theme-toggle{position:absolute;top:5px;right:35px;display:flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--primary);cursor:pointer;z-index:10;background:rgb(255 255 255 / .1);backdrop-filter:blur(5px);padding:8px 12px;border-radius:20px;border:1px solid rgb(255 255 255 / .2);box-shadow:0 2px 10px rgb(0 0 0 / .1);user-select:none}body.dark-mode .theme-toggle{background:rgb(0 0 0 / .3);border-color:rgb(255 255 255 / .1)}.theme-toggle .sun{opacity:1}.theme-toggle .moon{opacity:.25}body.dark-mode .theme-toggle .sun{opacity:.25}body.dark-mode .theme-toggle .moon{opacity:1}.tool-wrapper{width:100%;max-width:82rem;margin-left:auto;margin-right:auto;display:grid;grid-template-columns:repeat(1,minmax(0,1fr));gap:2rem;align-items:start;padding-bottom:30px}@media (min-width:1024px){.tool-wrapper{grid-template-columns:repeat(12,minmax(0,1fr))}}.controls{color:var(--text);border-radius:1rem;box-shadow:0 20px 25px -5px rgb(0 0 0 / .1),0 10px 10px -5px rgb(0 0 0 / .04);padding:1.5rem;border:1px solid #e5e7eb;background:var(--container-bg)}@media (min-width:1024px){.controls{grid-column:span 5 / span 5}}body.dark-mode .controls{border-color:rgb(255 255 255 / .1)}.image-to-pdf-title-suite{color:#e74c3ce6!important}.image-to-pdf-title{color:#ffffff!important}.calc-mode{display:none}.calc-mode.active{display:block;animation:fadeIn 0.3s ease}@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.mode-title{font-size:1.4rem;color:var(--text)!important;margin-bottom:8px;font-weight:700}.mode-description{color:var(--text);opacity:.7;margin-bottom:25px;font-size:.95rem}.options-row{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px;margin-bottom:20px}@media (max-width:480px){.options-row{grid-template-columns:1fr}}.input-group{margin-bottom:20px;position:relative}.input-group label{display:block;font-size:.95rem;font-weight:600;color:var(--text);margin-bottom:8px}.styled-select{width:100%;border:2px solid #e5e7eb;border-radius:10px;font-size:.9rem;font-weight:600;color:var(--text);background:var(--container-bg);cursor:pointer;outline:none;transition:var(--transition);appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2395a5a6' d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:32px}.styled-select:focus,.styled-select:hover{border-color:var(--accent)}body.dark-mode .styled-select{border-color:rgb(255 255 255 / .15);background-color:rgb(255 255 255 / .05)}.file-upload-wrapper{position:relative}.file-input{position:absolute;width:0;height:0;opacity:0;overflow:hidden;pointer-events:none}.file-upload-area{border:2px dashed #bdc3c7;border-radius:12px;padding:40px 20px;text-align:center;background:rgb(255 255 255 / .5);cursor:pointer;transition:var(--transition)}body.dark-mode .file-upload-area{background:rgb(255 255 255 / .05);border-color:#555}.file-upload-area:hover{border-color:var(--accent);background:rgb(231 76 60 / .05);transform:scale(1.02)}.file-upload-area.dragover{border-color:var(--accent);background:rgb(231 76 60 / .1);transform:scale(1.02)}.upload-icon{color:var(--accent);margin-bottom:15px}.upload-text{font-size:1rem;font-weight:600;color:var(--text);margin-bottom:5px}.upload-subtext{font-size:.85rem;color:var(--text);opacity:.6}.image-preview-list{background:rgb(0 0 0 / .03);border-radius:12px;padding:14px;margin-bottom:20px;border:1px solid #e5e7eb}body.dark-mode .image-preview-list{background:rgb(255 255 255 / .04);border-color:rgb(255 255 255 / .1)}.preview-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.preview-label{font-size:.9rem;font-weight:600;color:var(--text);opacity:.8}.clear-all-btn{background:none;border:none;font-size:.85rem;font-weight:600;color:var(--accent);cursor:pointer;padding:4px 8px;border-radius:6px;transition:var(--transition)}.clear-all-btn:hover{background:rgb(231 76 60 / .1)}.preview-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;max-height:220px;overflow-y:auto;padding-right:4px}.preview-grid::-webkit-scrollbar{width:5px}.preview-grid::-webkit-scrollbar-track{background:#fff0}.preview-grid::-webkit-scrollbar-thumb{background:var(--accent);border-radius:10px}.preview-item{position:relative;border-radius:8px;overflow:hidden;background:rgb(0 0 0 / .06);aspect-ratio:1;border:1px solid rgb(0 0 0 / .08);transition:var(--transition)}body.dark-mode .preview-item{background:rgb(255 255 255 / .06);border-color:rgb(255 255 255 / .1)}.preview-item:hover{transform:scale(1.04);box-shadow:0 4px 14px rgb(0 0 0 / .15)}.preview-item img{width:100%;height:100%;object-fit:cover;display:block}.preview-remove{position:absolute;top:4px;right:4px;background:rgb(231 76 60 / .9);border:none;border-radius:50%;width:22px;height:22px;display:flex;align-items:center;justify-content:center;cursor:pointer;color:#fff;font-size:14px;line-height:1;transition:var(--transition);padding:0;opacity:0}.preview-item:hover .preview-remove{opacity:1}.preview-remove:hover{background:var(--accent);transform:rotate(90deg)}.preview-order-badge{position:absolute;bottom:4px;left:4px;background:rgb(0 0 0 / .6);color:#fff;font-size:10px;font-weight:700;border-radius:4px;padding:2px 6px;line-height:1.4}.calculate-btn{width:100%;padding:16px;background:var(--success);color:#fff;border:none;border-radius:12px;font-size:1rem;font-weight:700;cursor:pointer;transition:var(--transition);display:flex;align-items:center;justify-content:center;gap:10px;box-shadow:0 8px 20px rgb(0 0 0 / .15);margin-bottom:20px;outline:none;text-decoration:none;line-height:1.4;box-sizing:border-box}.calculate-btn:hover:not(:disabled){opacity:.9;transform:translateY(-2px);background:var(--success);color:#fff}.calculate-btn:active:not(:disabled){transform:translateY(0)}.calculate-btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.calculate-btn.converting{animation:pulse 0.8s ease-in-out infinite}@keyframes pulse{0%,100%{transform:scale(1)}50%{transform:scale(.98)}}.conversion-progress{text-align:center;margin-bottom:20px}.progress-bar-container{width:100%;height:8px;background:rgb(0 0 0 / .1);border-radius:10px;overflow:hidden;margin-bottom:15px}body.dark-mode .progress-bar-container{background:rgb(255 255 255 / .1)}.progress-bar{height:100%;width:0%;background:linear-gradient(90deg,var(--success) 0%,var(--secondary) 100%);border-radius:10px;animation:progressPulse 2s ease-in-out infinite}@keyframes progressPulse{0%{width:10%}50%{width:80%}100%{width:10%}}.progress-text{color:var(--text);font-weight:600}.result-box{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);padding:25px;border-radius:16px;text-align:center;box-shadow:0 10px 25px rgb(0 0 0 / .2);margin-bottom:20px}.result-main{font-size:2rem;font-weight:700;color:#fff;margin-bottom:10px;text-shadow:0 2px 4px rgb(0 0 0 / .2)}.result-formula{font-size:1.1rem;color:rgb(255 255 255 / .9);margin-bottom:15px;font-weight:500}.result-detail{margin-top:15px}.download-btn{display:inline-flex;align-items:center;gap:10px;background:#fff;color:#667eea;padding:12px 30px;border-radius:30px;text-decoration:none;font-weight:600;transition:var(--transition);box-shadow:0 4px 15px rgb(0 0 0 / .2)}.download-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgb(0 0 0 / .3);color:#667eea;text-decoration:none}.error-box{background:#f8d7da;border:2px solid #f5c6cb;border-radius:12px;padding:20px;margin-bottom:20px;align-items:center;gap:15px}body.dark-mode .error-box{background:rgb(248 215 218 / .2);border-color:rgb(245 198 203 / .3)}.error-icon{font-size:2rem;flex-shrink:0}.error-message{color:#721c24;font-weight:500}body.dark-mode .error-message{color:#f8d7da}.info-display-container{display:flex;flex-direction:column;gap:30px}@media (min-width:1024px){.info-display-container{grid-column:span 7 / span 7}}.steps-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.step{display:flex;align-items:flex-start;gap:12px;padding:14px;background:var(--container-bg);border-radius:14px;box-shadow:0 3px 10px rgb(0 0 0 / .06);transition:all 0.3s ease;text-align:left;border:1px solid #e5e7eb}body.dark-mode .step{border-color:rgb(255 255 255 / .1)}.step:hover{transform:translateY(-3px);box-shadow:0 6px 14px rgb(0 0 0 / .12)}.step-number{display:flex;align-items:center;justify-content:center;width:32px;height:32px;min-width:32px;background:#d70932;color:#fff;font-weight:700;border-radius:50%;flex-shrink:0;font-size:15px;box-shadow:0 4px 8px rgb(0 0 0 / .2)}.step p{margin:0;font-size:13px;color:var(--text)}.steps-grid-mobile{display:none}.info-section{display:grid;grid-template-columns:1fr;gap:20px}.info-card{background:var(--container-bg);padding:25px;border-radius:var(--border-radius);box-shadow:0 3px 10px rgb(0 0 0 / .06);border:1px solid #e5e7eb}body.dark-mode .info-card{border-color:rgb(255 255 255 / .1)}.info-card p{font-size:1.2rem;margin-bottom:15px;color:var(--text)!important;font-weight:600}.info-card ul{list-style:none;padding:0;margin:0}.info-card li{padding:8px 0;padding-left:25px;position:relative;color:var(--text);line-height:1.6}.info-card li::before{content:'✓';position:absolute;left:0;color:var(--success);font-weight:700}.info-card li strong{color:var(--accent)}@media (max-width:768px){.img-pdf-container{padding:50px 0}.controls{margin-top:0;border:none!important;box-shadow:none!important}.tool-wrapper{width:95%;gap:0!important}.result-main{font-size:1.5rem}.steps-grid{display:none}.steps-grid-mobile{display:block!important;padding-bottom:50px}.steps-grid-mobile .step{margin-bottom:16px}.info-section{padding:0 10px}.file-upload-area{padding:30px 15px}.preview-grid{grid-template-columns:repeat(4,1fr)}}@media (max-width:480px){.result-main{font-size:1.3rem}.result-formula{font-size:1rem}.download-btn{padding:10px 20px;font-size:.9rem}.preview-grid{grid-template-columns:repeat(3,1fr)}}